华东师范大学学报(自然科学版) ›› 2005, Vol. 2005 ›› Issue (5/6): 152-156.

• 物理学 电子科学技术 • 上一篇    下一篇

复合玻璃包裹纳米晶细丝的巨磁阻抗效应

王蕊丽,赵振杰,袁望治,阮建中,刘龙平,杨燮龙   

  1. 华东师范大学 物理系,纳米功能材料与器件应用研究中心，上海200062
  • 收稿日期:2004-01-08 修回日期:2004-03-16 出版日期:2005-12-31 发布日期:2005-12-31
  • 通讯作者: 杨燮龙

Giant Magneto-impedance Effects in Nanocrystalline Composite Glass-coated Microwires(Chinese)

WANG Rui-li,ZHAO Zhen-jie,YUAN Wang-Zhi,RUAN Jian-zhong,LIU Long-ping,YANG Xie-long   

  1. Center of Functional Nanomaterials and Devices, Department of Physics, East China Normal University, Shanghai200062,China
  • Received:2004-01-08 Revised:2004-03-16 Online:2005-12-31 Published:2005-12-31

摘要： 采用磁控溅射法在铁基纳米晶玻璃包裹丝外沉积铜层，研究了细丝在驱动电流流过不同层的巨磁阻抗效应.结果表明，沉积铜层后会使细丝的磁阻抗比最大值向低频段移动，并且发现当电流同时流入铜层和铁磁层时，在1 MHz时就有明显的磁阻抗效应.这与导电层和铁磁层之间存在电磁相互作用有关.

关键词: 巨磁阻抗效应, 起始频率, 纳米晶, 玻璃包裹, 巨磁阻抗效应, 起始频率, 纳米晶, 玻璃包裹

Abstract:

Composite structured samples of glass-coated Fe-based nanocrystalline wires deposited with a layer of copper by magnetron sputtering method were prepared. The giant magneto-impedance effect (GMI) observed from the samples was carried out as ac driving current flowed through ferromagnetic core, copper shell, and both of the core and shell, respectively. It is found that the maximum GMI frequency decreases from 80 MHz to 60 MHz with copper layer when the current flows through ferromagnetic core. The onset GMI freqwency is also decreased. The results show the electromagnetic interaction between the shell layer and the core.

Key words: onset frequency, nanocrystalline, glass-coated, giant magneto-impedance effect, onset frequency, nanocrystalline, glass-coated

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